One man was taken to hospital and three others were injured after a fight downtown.
It happened around 3 o'clock Sunday morning at Bay and King Streets.
Police say four men between the ages of 19 and 24 were stabbed -- one of whom was taken to hospital with serious, but not-life-threatening injuries.
A 29-year-old was arrested but released pending further investigation, while a second suspect is still outstanding.
Police say the victims are not cooperating with them and the everyone involved knows each other.